The heat of atomisation of methane and ethane are 'x' kJ mol ⁻¹ and 'y' kJ mol ⁻¹ respectively. The longest wavelength (λ) of light capable of breaking the C–C bond can be expressed in SI unit as:

Atomic Structure: JEE Main 2026 Chemistry question

JEE Main 2026 · 24 Jan, Evening shift · Q60

JEE Main 202624 Jan, Evening shiftChemistryEasyAtomic Structure113× since 2002

The heat of atomisation of methane and ethane are 'x' kJ mol

^{-1}

and 'y' kJ mol

^{-1}

respectively. The longest wavelength (

\lambda

) of light capable of breaking the C–C bond can be expressed in SI unit as: